Kessleria dimorpha is a moth of the Yponomeutidae family. It is found only on the French side of ColAgnel (Cottian Alps), close to the Italian border. The habitat consists of rocky areas on siliceous soilThe length of the forewings is 8-8.4 mm for males and about 6 mm for females. The forewings of the males are dark grey, intensively mottled with light grey, ochre-brown and whitish scales and with a white medial patch in the fold.